Conveying device for sifting-machines and the like.



J. BROWN.. GONVEYING DEVIGE FOR SIFTING MACHINES AND THELIKE'..

APPLIOATION PILED JULY 1, 1913.

Patented June 16, 1914.

NVENTEIR TTCIRNELY&

WW/W mur UNITED STATES PATENT OFFICE.

JOHN BROWN, OF NIAGARA FALLS, NEW YORK.

CONVEYING DEVICE FOR SIFTING-MACHINES AND THE LIKE.

To all whom it may concern Be it known that I, JOHN BROWN, a citizen ot the United States, residing at Niagara Falls, in the county ot Niagara and State ot New York, have invented new and usetul Improvements in Conveying Devices tor sitting-Machines and the like, ot which the following is a specification.

This invention relates to a conveying device which is more particularly designed tor use in a sitting machine in which the screens or sieves are mounted in a horizontally rotating or gyrating box or chamber and which requires means whereby this box or chamber is movably connected with the stationary bin, hopper or source ot supply ot the material to be sitted and also means whereby the separated material is discharged trom the sitting box to a stationary receptacle.

Heretotore the connections between the sitting box and the stationary source ot supply and the stationary receiving device were efl'ected by means which comprised pliable or flexible tubes made ot teXtile tabric, each tube being connected at one end with the movable sitting box while its other end was connected with the companion stationary member ot either the supplying or receiving device. This torm of chute or spout tor conducting the material to and from the sitting box is objectionable tor the reason that it wears o-ut very rapidly and theretore requires frequent renewal in order to prevent the loose material which is being sitted, such as flour, trom esoaping into the building where it is not only lost but also is dangerous and injurious.

It is the object ot this invention to provide inproved means tor connecting the movable sitting box with the stationary devices trom which the sitting machine is supplied with the material to be sitted and which receive the material after being sitted, these means being so organized that they are very durable, inexpensive in Construction and not liable to get out ot order so that renewal ot the same is only necessary at intrequent intervals and the machine theretore does not have to be stopped very otten tor this purpose.

In the accompanying drawings Figure l is a vertical section of a fiour sitting machine provided with my improvements. Fig. 2 is a vertical section, on an enlarged scale, ot one ot the conveying devices Specification of Letters Patent.

Application filed July 1, 1 913.

Patented June 16, 1914:.

Serial No. 7763780.-

whereby the 'sitting box is connected with an adjacent stationary supplying or receivng device. Figs. 3 and 4: are horizontal sections in the correspondingly numbered lines in Fig. 2.

Similar characters ot reference indicate corresponding parts throughout the several vews.

Although my improvements are applicable to sitting machines which may vary in details ot Construction that shown in the drawings, as an example, comprises a horizontally rotating or gyrating box or chamber 1 arranged between the ceiling 2 and the floor 3 ot the building and containing one or more sieves t whereby the flour or similar material which is delivered into the upper end thereot is separated or graded as to size and delivered at the lower end thereot.

Any suitable means may be provided tor 'ettecting'the horizontal rotating or gyrating movement, and the sitting box may also be movably supported in any suitable manner, tor instance, as shown in the drawings, by means ot fiexible upright suspension bars 5 secured at their upper ends to the ceiling while their lower ends are secured to the sitting box or chamber.

At its upper end the sitting box is connected with the stationary source ot supply ot materialwhich is to' be sitted by means ot one or more ot my conveying devices and at its lower end this sitting box or chamber is also connected by one or more conveying devices embodying my invention with a 'stationary receiver adapted to receive the separated material. Each of these conveying devices tor delivering the material to be sitted either to the sitting box or discharging the separated material trom the 'box is preterab'ly constructed as shown in Fig.2, it being assumed that the conveying'device shown in this figure is one ot those whereby the flour to be sitted is delivered trom an overhead spout, bin or other stationary source ot supply to the sitting box.

As shown in Figs. 2, 3 and 4, 6 represents a lower enlarged outer tube ot sheet metal or other suitable material which communicates at its lower end with an opening in the top or upper end ot the sitting box and is secured to the latter by means ot nails or other suit-able tastenings passing through an annular tia-nge 7 on the lower end ot the tube and into the adjacent part of the sifting box. At its upper end the outer tube is provided with an annular rim or collar 8 which is preferably eonstructed of wood and to the upper side of this wooden rim is Secured a packing or facing 9 of leather or other suitable material.

10 represents an upper inner tube of smaller diameter than the outer tube and also constructed preferably of sheet metal. This inner tube is arranged vertically and has its lower end projecting into the upper part of the outer tube while its upper end is secured to the lower end or bottom of the bin, hopper or spout which supplies the material, such as fiour, which is to be sifted. The bottom of this supply bin in this case is represented by the ceiling 2. The diameter of the lower tube is suticiently large that the same Will constantly inclose the inner tube in all positions of the sitting box during the gyrating or rotating movement thereo', so that at all times a free communication is established between the nterior of the inner tube and the interier of the outer tube.

In order to close the space between the eX- terior of the inner tube and the upper end of the outer tube a cover, lid or shutter ll having preferably the form of a disk or ring and construeted of sheet metal is mounted on the outer side or periphery of the inner tube and adapted to engage slidingly with the upper edge of the outer tube and its rim. A dust tight joint is produced between this cover and the outer tube by providing the underside of this disk with an annular packing or facing 12 of felt or similar material which rests upon the leather facing on the outer tube and rim. In order to permit the cover to always lie firmly in engagement with the leather packing ring 9 this cover is mounted loosely on the inner tube so as to move freely axially relatively thereto, but a dust tight joint is produced between this inner tube and the cover by means of a rim 13 of wood or ot-her suitable material Secured to the upper side of the cover around the inner tube, and a fiexible collar 14 of fiannel or other suitable naterial surrounding the inner tube and secured at its upper end to the periphery of the inner tube while its lower end is secured to the wooden rim of the cover. By this means the cover is free to rise and fall the required extent on the inner tube and remain firmly in sliding engagement with the upper edge of the outer tube, thereby providing a dust tight connection between the inner and outer tubes in all positions of the sitting box relative to the source of supply.

The parts described so far may be utilized without the employment of anything else for conducting the fiour or other material to be sifted from the inner tube into the outer tube and thence to the sieves of the box, and

the sifted material may in like manner be discharged from the sitting box to the'receptacles intended to receive the sane. When thus used the material fiowing downwardly through the inner tube will be dischargcd into the outer tube in all positions of these tubes relatively to each other in a horizontal direction. In order, however, to render the connection between the sitting box and the source of supply and the place of discharge still tighter, an additional or auxiliary tube 15 is inserted vcrtically within the inner tube and provded at its upper end with an external annular fiange 16 which rests upon the upper end of the inner tube while the lower end of this auxiliary tube is connected below the lower end of the inner tube with the cnlarged outer tube by means of a circular flexible diaphragm 17, as shown in F igs. 2 and 4. This diaphragm preferably is of accordion-shape and forms a fiexible connection between the auxiliary tube and the outer tube which permits the outer tube to move freely horizontally relatively to the auxiliary tube during the rotating or gyrating movement of the sitting box and still operates as a separating wall between the outer tube and the inner tube for more eli'ectually preventing the passage of any dust to the exterior of the machine. This auxiliary tube and diaphragm are,` however, not usually necessary and may only be required when handling exceedingly fine material inasmucl as this conveying device without the use of the auxiliary inner tube and diaplragm have been enployed with perfect success in fiour sitting machines of the type shown in the drawings.

When this conveying device is employcd for delivering material from a source of supply to the sitting machine the inner tube, and the auxiliary tube i' the latter is used, are the stationary tubular members and the outer tube is the movable tubular member, but when this device is employed at the lower end of the sitting machine for discharging the separating material thcrctrom to a receving place the outer enlargcd tube becomes the stationary member and the inner tube, as well as the auxiliary tube if the latter is employed, become the movable members of this conveying device.

This conveying device is exceedingly simple in Construction, it has no delicate parts which are liable to get out of order, the same produces a perfectly tiglit oint between the stationary and movable parts of the machine, and the same can be rcnewcd at comparatively low cost when worn out.

I claim as my invention:

1. A conveying device comprising a delivery tube having an outlet end, a receiving tube having an lnlet end which communicates with the outlet end of the delivery tube, said tubes being capable of a relative gyratory movement in a plane at right angles to said tubes, and a cover mounted on the delivery tube and engaging with the inlet of the receiving tube.

2. A conveying device comprsing a delivery tube having an outlet end, a receiving tube having an inlet end which communicates with the outlet end of the delivery tube, said tubes being capable of a relative gyratory movement in a plane at right angles to said tubes and a cover mounted transversely and loosely on the delivery tube and engagng slidingly with the inlet end of the receiving tube.

3. A conveying device conprising a delivery tube having an outlet end, a receiving tube having an inlet end which communicates With the outlet end of the delivery tube, said tubes being relatively movable in a direction crosswise of the tubes and said receivin tube being of larger diameter than said delivery tube and a cover mounted on the delivery tube so that its plane is at right angles to the length of said tube and engaging with said receiving tube.

4. A conveying device comprising a delivery tube having an outlet end, a receiving tube having an inlet end which communicates with the outlet end of the delivery tube, said tubes being relatively novable in a direction crosswse of the tubes, a cover mounted v loosely on the delivery tube so that its plane is at right angles to the length of said tube and engaging slidingly with the` inlet end of the receiving tube, and a packing interposed between the cover and the receiving tube.

5. A conveying device comprising a delivery tube having an outlet end, a receiving tube having an inlet end which communicates with the outlet end of the delivery tube, said tubes being relatively movlivery tube having an outlet end, a receiving tube having an inlet end which communicates with the outlet end of the delivery copies of this patent may be obtaincd for tube, said tubes being relatively movable in a direction crosswise of the tubes, said delivery tube being of smaller diameter than the receiving tube and projecting into the latter, and a cover mounted loosely on the delivery tube and engaging slidingly with the inlet end of the receiving tube.

7. A conveying device comprising a delivery tube having an outlet end, a receiving tube having an inlet end which communicates with the outlet end of the delivery tube, said tubes being relatively movable in a direction crosswise of the tubes, a cover monnted on the delivery tube and engaging with the inlet end of the receiving tube, an auxiliary tube arranged within the delivery tube, and a fiexible connection between said auxliary tube and said receiving tube.

8. A conveying device comprising a delivery tube having an outlet end, a receiving tube having an inlet end which communicates with the outlet end of the delivery tube, said tubes being relatively movable in a direction crosswise of the tubes, a cover mounted on the delivery tube and engaging with the inlet end of the receiving tube, an auXiliary tube arranged within the deliver3 tube and provided at its upper end with an annular fiange resting on the upper end of said receiving tube, and a fieXible connection between said auxiliary tube and said receiving tube.

9. A conveying device comprising a delivery tube having an outlet end, a receiving tube having an inlet end which communicates with the outlet end of the delivery tube, said tubes being relatively movable in a direction crosswise of the tubes, a cover mounted on the delivery tube and engaging with the inlet end of the receiving tube, an auxiliary tube arranged within said delivery and receiving tubes, and an accordionshaped diaphragm connecting said auxiliary tube with said receiving tube below the outlet of said delivery tube.

itness my hand this 28th day of June, 1913.

JOHN BROWN.

Witnesses:

SoLoMoN KIMPEL, WALTER F. RosING.

five cents each, by addressing the Commissioner of Patents,

Washington, I). C." 

